// return the child atom of the corresponding type.
// type can contain grand children: e.g. type = "trak.mdia.minf"
// return null if the atom does not contain such a child.
public Atom getChild(String type) {
if (mChildren == null) {
return null;
}
String[] types = type.split("\\.", 2);
for (Atom child : mChildren) {
if (child.getTypeStr().equals(types[0])) {
if (types.length == 1) {
return child;
} else {
return child.getChild(types[1]);
}
}
}
return null;
}
